Visit to a Small Planet (1960)
The weirdest alien of the galaxy pays a visit to Earth... Jerry Lewis is Kreton, a childish alien who, against his teacher's will leaves his planet to visit the Earth, and lands in the backyard of a famous television journalist who doesn't believe in UFOs and aliens. Wanting to study humans but not able to fully understand them, Kreton makes a mess out of it, generating a lot of comic situations.
Directed by: Norman Taurog
Starring: Jerry Lewis, Joan Blackman, Earl Holliman, Fred Clark, John Williams, Jerome Cowan
Links: Paramount Pictures, IMDb, Movie posters, Movie stills